The following new features are available with Cisco IOS software release 12.2(40)SE for Metro Ethernet switches:

• Resilient Ethernet Protocol (REP): REP is a Cisco technology that allows fast convergence and high availability in a switch ring topology. The capability provides loop prevention and does not utilize spanning tree.

• Source-Specific Multicast (SSM): The SSM capability is an efficient and optimized multicast protocol that is used for one-to-many multicast applications such as video. The protocol is easier to deploy than traditional multicast protocols and utilizes Internet Group Management Protocol version 3 (IGMPv3).

• Configuration Replace: The configuration replacement and configuration rollback feature provides the capability to replace the current running configuration with any saved Cisco IOS configuration file. This functionality can be used to revert to a previous configuration state, effectively rolling back any configuration changes that were made since that configuration file was saved. This feature simplifies and reduces operational overhead.

• Embedded Event Manager (EEM): Cisco IOS EEM is a powerful tool for system management and automation. The capability will automate troubleshooting and network deployment and reduce operational expense. EEM helps enable customers to utilize the network intelligence intrinsic to Cisco IOS Software and customize the behavior based on real network events. Customers can define policies to take specific actions for certain events using built-in event detectors.

• Link Layer Discovery Protocol Media Extensions (LLDP-MED) Location Support: LLDP support has been extended to include client location information using the LLDP Media Extensions. The device location information can be used by inventory management for emergency response services, such as Enhanced 911 (E911).

• Cisco Media Access Control (MAC) Notification MIB: The MAC Notification MIB enables the switch to track MAC addresses that are learned or removed. Histories of the MAC addresses that are learned and deleted from the switch are tracked, and notifications can be generated based on threshold limits.

• DHCP Snooping Statistics: DHCP snooping statistics provide the total count of the packets processed along with counts for various conditions that can cause a packet to be dropped.

You must purchase the EMI/IP Services or Advanced IP Services software upgrade kit when upgrading a switch from SMI/IP Base to EMI/IP Services or Advanced IP Services software. Downloads of SMI/IP Base, EMI/IP Services, and Advanced IP Services files are monitored for adherence to this requirement.

Because of export restrictions on strong cryptography software, a separate image is required for the cryptographic features (SSH, SNMPv3, and Kerberos Protocol). These software images can be downloaded from the corresponding Triple Data Encryption Standard (3DES) area of the links provided in this section. Note that the Cisco Advanced IP Services license is available only in cryptographic format.